The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 2022
Filed:
Feb. 23, 2016
Koninklijke Philips N.v., Eindhoven, NL;
Lucas Johannes Anna Maria Beckers, Eindhoven, NL;
Franciscus Johannes Gerardus Hakkens, Eindhoven, NL;
Peter Dirksen, Eindhoven, NL;
KONINKLIJKE PHILIPS N.V., Eindhoven, NL;
Abstract
An ultrasound array for acoustic wave transmission comprising at least one capacitive micro-machined ultrasound transducer (CMUT) cell (), wherein the CMUT cell comprises a substrate (); a first electrode (); a cell membrane () having a second electrode ('), which opposes the first electrode and the substrate with a cavity () there between, wherein the membrane is arranged to vibrate upon the cell activation; and an acoustic window layer (), overlaying the cell membrane, and having an inner surface opposing the cell membrane and an outer surface. The acoustic window layer comprises a first layer comprising molecules of antioxidant and a polymeric material () with insulating particles () embedded therein, wherein the polymeric material consists of hydrogen and carbon atoms and has a density equal or below 0.95 g/cmand an acoustic impedance equal or above 1.45 MRayl. This acoustic window layer provides an improved acoustic performance, such as wide bandwidth and low attenuation, in application with the CMUT based array.